3.3Lateral thinking
The essentials in 30 seconds
- Dig elsewhere: change direction instead of digging the same hole (vertical thinking).
- Break patterns: question assumptions, reverse, provoke, use chance.
- Complement: lateral generates the breakthrough, vertical develops it next.
Running case — Sara hits the waiting wall
Sara's team repeats we need more counters and goes in circles (same hole, deeper). Sara switches to lateral: do people really need to wait here? What if we removed waiting instead of speeding it? — ticket with callback time, mobile pre-reception, appointments. The problem bypassed rather than faced head-on.
Sequel to cases 3.1-3.2 — Sara changes angle when logic goes in circles.
1. Dig elsewhere, not deeper
Lateral thinking (Edward de Bono) is the art of approaching a problem from an unexpected angle, leaving usual logical patterns. It opposes vertical thinking (logical, digging deeper in the same direction).
Where vertical digs the same hole deeper, lateral seeks to dig elsewhere: change direction, question the obvious, go around the problem rather than face it head-on.
2. Breaking thinking paths
For efficiency, the brain always takes the same thinking paths — useful daily but confining for creative problems (you circle in the same ruts).
Lateral thinking uses provocations to break these patterns: question accepted assumptions, reverse the problem, use chance (random words), imagine absurd ideas to bounce off.
3. Complement to logic
Facing a problem deemed unsolvable head-on, the solution often comes from a complete change of perspective. Lateral thinking is not logic's enemy: it complements it by providing the breakthrough ideas linear logic cannot produce.
It is a mindset — daring to question the obvious and change angle — that runs through many techniques of this guide (associations, forced connections, reversal).
🔎 Concrete example — Questioning the obvious
A head-on problem unblocks by changing angle.
Head-on: How to get over this wall (more effort)?
Lateral: Do we really need to get over this wall? Is there a door elsewhere? Is the problem elsewhere?Principle: question the assumption (we must get over the wall).
Reflex: list what you believe mandatory, then challenge it.
Section vocabulary
- Lateral thinking
- The art of approaching a problem from an unexpected angle, leaving usual logical patterns (De Bono).
Simple example: Sara replaces speed up the queue with remove on-site waiting.
What it is not: adding a 4th identical counter hoping for a miracle.
Reflex: when going in circles: which angle have we not tried?
- Vertical thinking
- Logical, sequential thinking that digs deeper in the same direction (opposite of lateral).
Simple example: Optimizing the schedule of existing counters, step by step.
What it is not: changing angle in the middle of a logical analysis.
Reflex: use it after lateral to develop the kept idea.
- Thinking patterns
- Usual paths the brain takes for efficiency, but which confine facing creative problems.
Simple example: Reception = counter + queue repeated for years.
What it is not: a lack of intelligence or work.
Reflex: name the pattern: we assume that… then challenge it.
- Provocation
- A deliberately absurd idea used as a springboard to bounce toward new ideas.
Simple example: What if reception came to customers outside? → mobile pre-reception.
What it is not: keeping the absurd idea as-is as a solution.
Reflex: for each absurdity: what do we keep from it?
- Change of perspective
- Approaching a problem from a radically different angle to unblock a solution.
Simple example: Seeing the queue through the eyes of a hurried elderly person.
What it is not: restating the same thing with other words.
Reflex: adopt 3 views: child, competitor, customer.
In practice — Practicing lateral thinking
- Spot when you dig the same hole (vertical thinking going in circles): change angle.
- Question accepted assumptions (what if what we think mandatory were not?).
- Provoke: reverse the problem, imagine absurd ideas, use chance to bounce off.
- Seek a roundabout path / change of perspective rather than facing the problem head-on.
Ready-to-say script — triggering the lateral click (30 s)
We keep circling on more counters. Let us list what we believe mandatory: waiting here, going through the counter, in the morning. What if we challenged one obvious fact? For instance: what if nobody waited on site? What ideas does that give?
To say when the group repeats the same option: list the obvious facts, challenge one.
Copy-paste template — express lateral switch
PROBLEM (head-on): _______________
DIGGING THE SAME HOLE (repeated option): _______________
3 MANDATORY obvious facts: 1) ___ 2) ___ 3) ___
CHALLENGED FACT: _______________
REVERSAL (how to make it worse? → reverse): _______________
KEPT ROUNDABOUT OPTION: _______________Solo in a hurry
5 min: write obvious fact #1 then its opposite — one roundabout option is enough to restart.
Stuck team
Draw a random word and force 3 links with the problem: chance breaks ruts.
Technical problem
Reverse (how to guarantee failure?) reveals levers direct analysis misses.
Service / relationship
Adopt the extreme user view (hurried, elderly, foreigner): what is normal becomes strange.
✓ Best practices
- List your obvious assumptions, then challenge them one by one.
- Reverse the problem (how to make it worse?) to reveal levers.
- Approach the problem as a child, a competitor or a customer would.
✗ Common pitfalls
- Staying in vertical thinking when it goes in circles.
- Confusing lateral and vertical: both are needed.
- Rejecting an absurd provocation without drawing a rebound from it.
Key takeaways
- Lateral thinking approaches a problem from an unexpected angle, leaving usual patterns.
- It opposes vertical thinking (logical, digging the same hole) and complements it.
- The brain always takes the same paths (efficient, but confining for the creative).
- Techniques: question assumptions, reverse, use chance, provoke, change perspective.
48h challenge — apply tomorrow
Take 1 problem going in circles, list 3 obvious facts, challenge 1 and note 3 roundabout options (template above).
- I can tell lateral from vertical thinking and know when to switch.
- I challenged 1 obvious fact with 3 roundabout options.
- I drew 1 usable rebound from a provocation.
Frequently asked questions
What is the difference between lateral and vertical thinking?
Two complementary modes. Vertical is logical, sequential: you dig deeper in one direction — excellent to execute and reason. Lateral seeks to dig elsewhere: change direction, question the obvious. Lateral generates breakthrough ideas, vertical evaluates and develops them.
How do I concretely leave my usual patterns?
Question assumptions (what if it were not mandatory?); reverse the problem; introduce chance (random words); provocation (an absurd idea as a springboard); change viewpoint or environment. Discomfort produces new ideas.
Sara's team repeats more counters with no effect. What lateral reflex?